Improvement in rotary cutter-heads



2 Sheets-sheet 1. M. V. BAVIS.

Rotary Gutter-Head No. 221,020. Patented Oct. 28, 1879.

l A A gig 1 [HI I .3 llllll FiqQI- UNITED STA Es PATENT OEEIeE.

MARTIN V. BAVIS, OF LINWOOD, OHIO.

iMPROVEMENT -|N ROTARY CUTTER-HEADS.

Specification forming part of Letters Patent No. 221,020, dated October28, 1879; application filed April 12,1879.

To all whom it may concern: I

Be it known that I, MARTIN V. BAVIS, of Linwood, in the county ofHamilton and State of Ohio, have invented a new and useful 1mprovementin RotaryCutter-Heads, which improvement is fully set forth in thefollowing specification and accompanying drawings, in which-- Figures 1and 2 are side elevations of the cutter-head. Fig. 3 is a plan view ofthe lower halfof the head, showing how the cutter-blades are attached tothe head. Fig. 4 is a plan of the cutter-head, showing the block towhich the blades are attached. Fig. 5is a plan View of the upper half ofthe cutter-head. Fig. 6 is a perspective view of one half of thecutterhead.

The object of my invention is to provide a cutter-head which shall beadapted for all purposes for which a cutter-head is used, and which isconstructed of two parts having peculiar-shaped blocks cast thereon, towhich the cutting-blades are attached, as will be hereinafter more fullydescribed.

In the drawings, A represents a circular piece, having cast to its underface a block, A. This block has two of its opposite sides perpendicularto the under side of the circular piece A and parallel with each other,and the cutter-blades E E are bolted thereto by means of bolts apassin gthrough slots din the cutting-blades. The four sides of this block arenot at right angles to each other, but slightly oblique, so that two ofthe diagonal corners reach almost to the edge of the circular piece A,and the cutting ends of the blades E E are at the corners of the block Awhich.

approach nearestto the edge of circular pieceA. The circular piece B isprovided with a block,

B, similar in construction to A, having cutter-blades D D attachedthereto'by means of bolts 1).

A gain, O, is cut into the blocks A B, as shown in Figs. 3, 4,'and 5,and the two blocks fastened to each other by interloekin g in the gains.

A hole, G, is formed centrally in the circular pieces A B and blocks AB, through which a shaft or mandrel passes-for imparting motion to thecutter-heads.

Any shaped cutter-blade can be attached to the blocks for cuttingmolding, and either the upper or lower half of the cutter-head can beemployed,

My invention refers particularly to the construction of the circularpieces and the blocks attached thereto, and also the method of clampingtogetherthe two parts of the head,as shown, by means of the gains 0.Therefore,

What I claim as new, and desire to secure by Letters Patent, is

A cutter-head composed of a disk, A, on one face of which is a block, A,whose sides form a rhomboid, and having two of its opposite faces cutaway, as shown, and cutters attached to the two other faces, the saidblock having a gain, 0, formed on its upper side, to register with again in another block, similarly constructed, substantially as hereinset forth.

In testimony that I. claim the foregoing I have hereunto set my handthis 15th day of March, A. D. 1879, in the presence of wit- 'nesses.

MARTIN V. BAVIS.

Witnesses:

J. S. ZERBE, B. F. CONRAD.

